发明名称 |
System and method for determining position or speed of a commutated DC motor with error correction |
摘要 |
A motor control system and method are provided for detecting current ripple in a commutated DC motor and further determining position and speed of the motor based on the detected ripple current. Ripples in the motor current are detected and a ripple frequency is calculated based on the time between successive ripples. A ripple count between successive frequencies is determined and the ripple count is compared to a threshold value, and an estimated ripple frequency is determined from a motor model when the ripple count exceeds the threshold value. A corrected ripple count is calculated from a ratio of the calculated ripple frequency and the estimated ripple frequency, and motor position and motor speed are determined based on the corrected ripple count.
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申请公布号 |
US2009254300(A1) |
申请公布日期 |
2009.10.08 |
申请号 |
US20080152302 |
申请日期 |
2008.05.14 |
申请人 |
SCHNEIDER PHILIP K;CANALES SALVADOR A |
发明人 |
SCHNEIDER PHILIP K.;CANALES SALVADOR A. |
分类号 |
G01P3/44;G01R23/15;G01R31/34 |
主分类号 |
G01P3/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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